:root{
    --hauteur-menu: 60px;
}
* {
    margin: 0px;
    padding: 0px;
    font-family: Montserrat, sans-serif;
}
nav {
    width: 100%;
    font-size: 18px;
    position: sticky;
    top: 0;
}
nav > ul {
    display: flex;
    text-align: center;
    box-shadow: 0px 1px 2px 1px rgba(0,0,0,0.3);
    height: var(--hauteur-menu);
}
nav ul {
    list-style-type: none;
}
nav > ul > li {
    background-color: rgb(255, 255, 255);
    position: relative;
    height: 100%;
    flex: 1;
}
nav > ul > li:hover > a{
    color: #2169EC;
}
nav > ul > li > a {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
li a {
    text-decoration: none;
    color: black;
}
.menu-deroulant > a:after{
    content: '❯';
    font-size: 15px;
    margin-left: 7px;
    display: inline-block;
}
.menu-deroulant:hover > a:after{
    animation: rotationFleche 0.2s linear forwards;
}
@keyframes rotationFleche {
    0% {
      transform: rotate(0deg);
    }
    50% {
      transform: rotate(45deg);
    }
    100%{
      transform: rotate(90deg);
    }
}
.sous-menu {
    margin-top: var(--hauteur-menu);
    width: 100%;
    text-align: left;
    overflow: hidden;
    max-height: 0;
    border-radius: 2px;
    background-color: white;
}
.menu-deroulant:hover > .sous-menu {
    animation: apparitionSousMenu 1s forwards;
}
@keyframes apparitionSousMenu {
    0% {
      box-shadow: 0px 3px 3px 1px rgba(0,0,0,0);
      border-top: 3px solid #2169EC;
    }
    30% {
      box-shadow: 0px 3px 3px 1px rgba(0,0,0,0.3);
    }
    100% {
      max-height: 50em;
      border-top: 3px solid #2169EC;
      box-shadow: 0px 3px 3px 1px rgba(0,0,0,0.3);
    }
}
.sous-menu > li:hover {
    background-color: rgba(33, 105, 236, 0.3);
}
.sous-menu > li > a {
    align-items: center;
    display: flex;
    height: 50px;
    padding-left: 20px;
    width: 100%;
}
.sous-menu > li:hover > a {
    color: white;
}
.planningdatesuite{
    text-align: center;
}
@media all and (max-width: 1920px) {
    
    .menu-deroulant{
        width: 90%;
    }
    nav{
        font-size: 22px;
    }
    .sous-menu {
        width: 90%;
    }
    .menu-déroulant > ul {
        flex:none;
    }
    #title{
        margin-left: 125px;
    }
    .planning_titre_live{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .title_planning_stream{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .image-recent{
        text-align: center;
        margin-bottom: 10px;
    }
    .image-ancien{
        margin-left: 150px;
        margin-bottom: 10px;
    }
    footer{
        margin-top: 15px;
    }
    .reseaux_title_planning_stream{
        text-align: center;
    }
    .liens_images_reseaux_planning_stream{
        text-align: center;
    }
}
@media all and (max-width: 1440px) {

    nav{
        font-size: 20px;
    }
    .menu-deroulant{
        width: 90%;
    }
    .sous-menu {
        width: 90%;
      }
    #title{
        margin-left: 125px;
    }
    .planning_titre_live{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .title_planning_stream{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .planningdatesuite{
        text-align: center;
    }
    .image-recent{
        text-align: center;
        margin-bottom: 10px;
    }
    .image-ancien{
        margin-left: 65px;
        margin-bottom: 10px;
    }
    footer{
        margin-top: 15px;
    }
    .reseaux_title_planning_stream{
        text-align: center;
    }
    .liens_images_reseaux_planning_stream{
        text-align: center;
    }
  }
@media all and (max-width: 1024px) {
    
    nav{
        font-size: 20px;
    }
    .menu-deroulant{
        width: 100%;
    }
    .sous-menu {
      width: 100%;
    }
    #title{
        margin-left: 25px;
    }
    .planning_titre_live{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .title_planning_stream{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .image-recent{
        text-align: center;
        margin-bottom: 10px;
    }
    .image-ancien{
        margin-left: 30px;
        margin-bottom: 10px;
    }
    footer{
        margin-top: 15px;
    }
    .reseaux_title_planning_stream{
        text-align: center;
    }
    .liens_images_reseaux_planning_stream{
        text-align: center;
    }
  }
@media all and (max-width: 768px) {
    
    nav{
        font-size: 16px;
    }
    .menu-deroulant{
        width: 100%;
    }
    .sous-menu {
      width: 100%;
    }
    #title{
        margin-left: 25px;
    }
    .planning_titre_live{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .title_planning_stream{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .image-recent{
        text-align: center;
        margin-bottom: 10px;
    }
    .image-ancien{
        margin-left: 65px;
        margin-bottom: 10px;
    }
    footer{
        margin-top: 15px;
    }
    .reseaux_title_planning_stream{
        text-align: center;
    }
    .liens_images_reseaux_planning_stream{
        text-align: center;
    }
}
@media all and (max-width: 425px) {

    nav{
        font-size: 14px;
    }
    .menu-deroulant{
        width: 90%;
    }
    .sous-menu {
        width: 90%;
    }
    #title{
        margin-left: 25px;
    }
    .planning_titre_live{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .title_planning_stream{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    footer{
        margin-top: 15px;
    }
    .image-recent{
        text-align: center;
        margin-bottom: 10px;
    }
    .image-ancien{
        margin-left: 53px;
        margin-bottom: 10px;
    }
    .reseaux_title_planning_stream{
        text-align: center;
    }
    .liens_images_reseaux_planning_stream{
        text-align: center;
    }
  }
@media all and (max-width: 375px) {

    nav{
        font-size: 14px;
    }
    .menu-deroulant{
        width: 90%;
    }
    .sous-menu {
        width: 90%;
    }
    #title{
        margin-left: 25px;
    }
    .planning_titre_live{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .title_planning_stream{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .image-recent{
        text-align: center;
        margin-bottom: 10px;
    }
    .image-ancien{
        margin-left: 25px;
        margin-bottom: 10px;
    }
    footer{
        margin-top: 15px;
    }
    .reseaux_title_planning_stream{
        text-align: center;
    }
    .liens_images_reseaux_planning_stream{
        text-align: center;
    }
  }
@media all and (max-width: 320px) {

    nav{
        font-size: 12px;
    }
    .menu-deroulant{
        width: 90%;
    }
    .sous-menu {
        width: 90%;
    }
    #title{
        margin-left: 25px;
    }
    .planning_titre_live{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .title_planning_stream{
        text-align: center;
        margin-top: 25px;
        margin-bottom: 25px;
    }
    .image-recent{
        margin-bottom: 10px;
    }
    .image-ancien{
        margin-bottom: 10px;
    }
    footer{
        margin-top: 15px;
    }
    .reseaux_title_planning_stream{
        text-align: center;
    }
    .liens_images_reseaux_planning_stream{
        text-align: center;
    }
}